linux-kernel - Re: [PATCH] V4L/DVB: mx1-camera: compile fix

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Message-ID: <Pine.LNX.4.64.1003161129460.5123@axis700.grange>
Date:	Tue, 16 Mar 2010 12:01:40 +0100 (CET)
From:	Guennadi Liakhovetski <g.liakhovetski@....de>
To:	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>
cc:	Linux Media Mailing List <linux-media@...r.kernel.org>,
	Mauro Carvalho Chehab <mchehab@...radead.org>,
	Antonio Ospite <ospite@...denti.unina.it>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Hans Verkuil <hverkuil@...all.nl>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] V4L/DVB: mx1-camera: compile fix

On Tue, 16 Mar 2010, Uwe Kleine-KÃ¶nig wrote:

> This is a regression of
> 
> 	7d58289 (mx1: prefix SOC specific defines with MX1_ and deprecate old names)
> 
> Signed-off-by: Uwe Kleine-KÃ¶nig <u.kleine-koenig@...gutronix.de>
> ---
>  arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h |    4 +++-
>  drivers/media/video/mx1_camera.c             |    8 +++-----
>  2 files changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h b/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h
> index 07be8ad..d25a65f 100644
> --- a/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h
> +++ b/arch/arm/plat-mxc/include/mach/dma-mx1-mx2.h
> @@ -31,7 +31,9 @@
>  #define DMA_MODE_WRITE		1
>  #define DMA_MODE_MASK		1
>  
> -#define DMA_BASE IO_ADDRESS(DMA_BASE_ADDR)
> +#define MX1_DMA_REG(offset)	MX1_IO_ADDRESS(MX1_DMA_BASE_ADDR + offset)

Here offset must be in parenthesis - plus is not the lowest-prio 
operation, so, someone might well call MX1_DMA_REG(x << 1), which is also 
almost what you do below, and this is a header...

> +#define MX1_DMA_CCR(x)		MX1_DMA_REG(0x8c + ((x) << 6))
> +#define MX1_DMA_DIMR		MX1_DMA_REG(0x08)

Why don't we also take comments to these registers - I promise, I won't 
complain about > 80 characters;)

>  
>  #define IMX_DMA_MEMSIZE_32	(0 << 4)
>  #define IMX_DMA_MEMSIZE_8	(1 << 4)
> diff --git a/drivers/media/video/mx1_camera.c b/drivers/media/video/mx1_camera.c
> index c167cc3..aa81acd 100644
> --- a/drivers/media/video/mx1_camera.c
> +++ b/drivers/media/video/mx1_camera.c
> @@ -48,8 +48,6 @@
>  /*
>   * CSI registers
>   */
> -#define DMA_CCR(x)	(0x8c + ((x) << 6))	/* Control Registers */
> -#define DMA_DIMR	0x08			/* Interrupt mask Register */
>  #define CSICR1		0x00			/* CSI Control Register 1 */
>  #define CSISR		0x08			/* CSI Status Register */
>  #define CSIRXR		0x10			/* CSI RxFIFO Register */
> @@ -783,7 +781,7 @@ static int __init mx1_camera_probe(struct platform_device *pdev)
>  			       pcdev);
>  
>  	imx_dma_config_channel(pcdev->dma_chan, IMX_DMA_TYPE_FIFO,
> -			       IMX_DMA_MEMSIZE_32, DMA_REQ_CSI_R, 0);
> +			       IMX_DMA_MEMSIZE_32, MX1_DMA_REQ_CSI_R, 0);
>  	/* burst length : 16 words = 64 bytes */
>  	imx_dma_config_burstlen(pcdev->dma_chan, 0);
>  
> @@ -797,8 +795,8 @@ static int __init mx1_camera_probe(struct platform_device *pdev)
>  	set_fiq_handler(&mx1_camera_sof_fiq_start, &mx1_camera_sof_fiq_end -
>  						   &mx1_camera_sof_fiq_start);
>  
> -	regs.ARM_r8 = DMA_BASE + DMA_DIMR;
> -	regs.ARM_r9 = DMA_BASE + DMA_CCR(pcdev->dma_chan);
> +	regs.ARM_r8 = (long)MX1_DMA_DIMR;
> +	regs.ARM_r9 = (long)MX1_DMA_CCR(pcdev->dma_chan);
>  	regs.ARM_r10 = (long)pcdev->base + CSICR1;
>  	regs.ARM_fp = (long)pcdev->base + CSISR;
>  	regs.ARM_sp = 1 << pcdev->dma_chan;

Yes, I think, that looks good now. Just correct the above issues and I'll 
ack it.

Thanks
Guennadi
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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